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Surface Water <br />• For the Lorencito Canyon Mine site azea, watersheds were determined for each of the major <br />named drainages within the permit area. Each of these divides between the watershed azeas <br />was delineated, and azeas planimetered to determine the total watershed area. In addition, the <br />length of each of the drainages was determined, along with the channel slope within the <br />permit azea. Determination of the flow at the surface water sites was done by direct <br />measurement with a current meter or flume. <br />Springs and seeps were first surveyed in January 1996 and subsequently confirmed in aerial <br />and ground surveys during March 1996. The first ground reconnaissance was performed by <br />transecting the property along the major drainages while examining for evidence of springs <br />and seeps. All springs and other water bodies noted during aerial reconnaissance were <br />confirmed by ground survey prior to transfer to the hydrology baseline map. A total of 11 <br />springs were located. The location of these springs is depicted on Map 2.04.7-1. <br />For each of the spring locations, flow and field parameters were determined. The flow values <br />were determined by piping or channeling all the flow from the spring to a central point and <br />then diverting this flow into a container of a known volume. The time for filling the container <br />was noted and this flow measurement translated to gallons per minute (gpm). <br />Surface waters including ponds were also surveyed quarterly in 1996. Ground surveys were <br />conducted in January in coordination with the spring and seep survey, and aerial <br />reconnaissance was performed in Mazch. All aerial data were confirmed on the ground prior <br />• to the transfer of this data to the hydrology map. A total of 19 ponds were located onsite. <br />Ponds were monitored by placing a staff gauge to record water level. Depth to the water <br />surface from the top of each staff gauge was measured quarterly. Locations of all ponds aze <br />depicted on Map 2.04.7-1. <br />Water Quality <br />To detemune the quality of the water within each groundwater formation, samples were <br />obtained from each well. Each well was developed by repetitive surging of the water column <br />within the well. This surging was accomplished utilizing a 3-inch Schedule 40 PVC bailer. <br />Each well was surged until turbidity within the well effluent was substantially reduced. A <br />minimum of three well volumes were removed or well production was performed until the <br />well was dry. Following this procedure, field parameters were obtained and recorded. <br />Subsequently, wells were sampled in accordance with 40CFR 136. Samples from each well <br />were obtained via a PVC bailer. Samples were preserved by cooling to 4 °C and shipped for <br />receipt by the laboratory within the required holding times. <br />During each sampling event at surface water sites, flows were determined at each station. <br />Field parameters were determined either via a Hydac pH/conductivity/temperature meter, an <br />Orion pII/temperatute meter and an Orion conductivity/temperature meter, or in 2003-2006 <br />• with an Oakton 35630 temperature/pH/conductivity meter, at each station in accordance <br />with 40CFR 136. Each of the sampled pazameters was determined by obtaining a <br />